console.log(`就是
这样
换行
的`);

console.log('其实\n这样\n也行')


var name='伞兵';
console.log(`我叫${name}是个歪果仁`);


var a = "wdnmdzz";
console.log(a[0]);
console.log(a[1]);
console.log(a[10]);


var b = "OMEN";
b[1]="s";
console.log(b);

var c = "Hello World";
var d = c.toUpperCase();
console.log(d);

var e = "WDNMD";
var f = c.toLowerCase();
console.log(f);

var g = "sanbingyihao";
console.log(g.indexOf("i"));
console.log(g.indexOf("x"));


var h = "godofwar";
console.log(h.substring(0,4));
console.log(h.substring(6));